nids_params:
https://github.com/MITRECND/libnids/commit/81d7ac0d09cb5c98cf8eff9e6aaba1f4eb5ed519
https://github.com/MITRECND/libnids/commit/4ab31b6efaf15a01b7121443b6e3de4cde13d3a5

Index: src/libnids.c
--- src/libnids.c.orig
+++ src/libnids.c
@@ -14,7 +14,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <syslog.h>
+#ifndef __OpenBSD__
 #include <alloca.h>
+#endif
 #include <pcap.h>
 #include <errno.h>
 #include <config.h>
@@ -32,6 +34,12 @@
 #include <glib.h>
 #endif
 
+#ifdef DLT_PFLOG
+#include <sys/socket.h>
+#include <net/if.h>
+#include <net/if_pflog.h>
+#endif
+
 #ifdef __linux__
 extern int set_all_promisc();
 #endif
@@ -108,7 +116,8 @@ struct nids_prm nids_params = {
     0,				/* multiproc */
     20000,			/* queue_limit */
     0,				/* tcp_workarounds */
-    NULL			/* pcap_desc */
+    NULL,			/* pcap_desc */
+    3600			        /* tcp_flow_timeout */
 };
 
 static int nids_ip_filter(struct ip *x, int len)
@@ -619,22 +628,46 @@ int nids_init()
     case DLT_NULL:
         nids_linkoffset = 4;
         break;
-#endif        
+#endif
+#ifdef DLT_LOOP
+    case DLT_LOOP:
+        nids_linkoffset = 4;
+        break;
+#endif
     case DLT_EN10MB:
 	nids_linkoffset = 14;
 	break;
     case DLT_PPP:
 	nids_linkoffset = 4;
 	break;
+#ifdef DLT_PPP_ETHER
+    case DLT_PPP_ETHER:
+	nids_linkoffset = 8;
+	break;
+#endif
 	/* Token Ring Support by vacuum@technotronic.com, thanks dugsong! */
     case DLT_IEEE802:
 	nids_linkoffset = 22;
 	break;
-
     case DLT_RAW:
     case DLT_SLIP:
 	nids_linkoffset = 0;
 	break;
+#ifdef DLT_OLD_PFLOG
+    case DLT_OLD_PFLOG:
+	nids_linkoffset = 28;
+	break;
+#endif
+#ifdef DLT_PFLOG
+    case DLT_PFLOG:
+	nids_linkoffset = PFLOG_HDRLEN;
+	break;
+#endif
+#ifdef DLT_PFSYNC
+    case DLT_PFSYNC:
+	nids_linkoffset = 4;
+	break;
+#endif
 #define DLT_LINUX_SLL   113
     case DLT_LINUX_SLL:
 	nids_linkoffset = 16;